Case 850B Dozer: An Overview and Troubleshooting Guide

[MikePhua]

The Case 850B Dozer is a robust piece of machinery built for heavy-duty earthmoving tasks. With a powerful engine, solid construction, and versatile design, it’s an excellent choice for tasks like road construction, land clearing, and mining operations. However, like any piece of heavy equipment, the 850B may face issues over time, whether due to wear and tear or improper maintenance.
In this article, we will explore the essential features of the Case 850B Dozer, common issues that owners may encounter, and offer a troubleshooting guide to ensure this powerful machine keeps running efficiently.
Key Features of the Case 850B Dozer
The Case 850B is known for its durability and ability to handle tough jobs. Key features of this model include:

• Engine: Powered by a 6-cylinder, turbocharged engine, the 850B provides impressive horsepower, making it capable of handling even the most challenging grading and earthmoving operations.
  
• Hydraulic System: The hydraulic system in the 850B is designed for smooth operation of the blade and other moving parts, providing precise control over the machine.
  
• Track System: The dozer is equipped with heavy-duty tracks that help it maintain stability and traction on rough terrain, which is essential for tasks like grading, leveling, and clearing.
  
• Operator Comfort: The 850B offers a comfortable cabin with easy-to-reach controls, improving operator efficiency and reducing fatigue during long work hours.
  

Common Issues with the Case 850B Dozer
While the Case 850B is known for its strength and performance, like any machine, it’s not immune to mechanical issues. Below are some of the common problems users may face with this model:
1. Hydraulic System Failures
Hydraulic system problems are a common concern with any dozer, including the Case 850B. These issues often arise from leaks, poor maintenance, or improper fluid levels, which can affect the functionality of the blade and other hydraulic components.

• Symptoms: Slow or erratic blade movement, uneven lifting, or unresponsiveness.
  
• Example: A user shared their frustration when the blade started moving inconsistently during operations. After a thorough inspection, they found a hydraulic line had worn out, leading to a fluid leak. Replacing the hose solved the issue.
  

Solution: Regularly check hydraulic fluid levels, inspect hoses for leaks, and replace any worn-out parts as soon as possible. Clean the hydraulic system periodically to prevent contamination.
2. Engine Overheating
Engine overheating is another common issue, especially when a dozer works under heavy loads for extended periods. Overheating can be caused by a variety of factors, including coolant leaks, clogged radiators, or a malfunctioning thermostat.

• Symptoms: The engine temperature gauge reading higher than normal, steam or smoke coming from the engine bay, or a loss of power.
  
• Example: One user reported that their 850B started overheating during long operations. Upon inspection, it was found that the radiator was clogged with dirt and debris, preventing proper airflow. After cleaning the radiator, the overheating issue was resolved.
  

Solution: Regularly inspect the radiator and cooling system. Ensure the coolant is at the correct level, and the radiator is free of obstructions. If necessary, replace the thermostat or check for coolant leaks.
3. Track and Undercarriage Wear
The track system of the Case 850B is designed to provide stability and traction in various working conditions. However, over time, the tracks and undercarriage can wear out due to constant use and exposure to harsh environments.

• Symptoms: Uneven or excessive wear on the tracks, squealing noises, or difficulty maintaining traction.
  
• Story: A Case 850B owner reported that their dozer had trouble maintaining traction on steep slopes. Upon inspection, they discovered that the tracks were excessively worn, causing them to slip and reduce efficiency. After replacing the tracks, the dozer’s performance improved dramatically.
  

Solution: Inspect the tracks regularly for signs of wear, and replace them when necessary. Lubricate the undercarriage components to reduce friction and extend their lifespan.
4. Transmission Issues
Transmission problems can also affect the performance of the Case 850B, particularly if there are issues with the fluid levels, pump, or seals. A malfunctioning transmission can cause jerky movements or make it difficult to shift gears.

• Symptoms: Sluggish or erratic gear shifting, grinding noises, or the machine failing to move forward or backward as expected.
  
• Example: An operator shared how their 850B started experiencing difficulty shifting gears. After examining the transmission fluid, they found it to be low and dirty. After changing the fluid, the problem was resolved.
  

Solution: Regularly check the transmission fluid and replace it if it’s dirty or low. Ensure that the fluid levels are consistent, and inspect the transmission components for damage or leaks.
5. Electrical System Failures
Electrical issues can also plague the Case 850B, often caused by faulty wiring, blown fuses, or malfunctioning components such as the alternator or starter motor.

• Symptoms: The dozer fails to start, flickering lights, or unresponsive control systems.
  
• Story: One 850B owner recounted how their dozer wouldn’t start, only to discover a blown fuse was preventing the starter from receiving power. After replacing the fuse, the dozer started without any problems.
  

Solution: Inspect the electrical system for damaged wires, blown fuses, and faulty components. Use a multimeter to check the voltage and ensure the alternator is charging the battery properly.
Preventative Maintenance Tips for the Case 850B Dozer
Proper maintenance is key to keeping your Case 850B in peak condition. Here are some tips for ensuring longevity and minimizing the risk of issues:

• Regular Fluid Checks: Always monitor fluid levels, including hydraulic fluid, coolant, and transmission oil. Keeping these at optimal levels helps avoid many common issues.
  
• Keep the Dozer Clean: Periodically wash the undercarriage and engine bay to remove dirt, dust, and debris. This can prevent overheating and reduce wear on moving parts.
  
• Inspect the Tracks: Regularly check for track tension and wear. Adjust the track tension as needed to prevent excessive wear on the undercarriage.
  
• Check for Leaks: Regularly inspect hoses, seals, and fittings for hydraulic, fuel, or coolant leaks. Early detection can prevent more serious damage.
  
• Replace Worn Parts Promptly: Don’t delay in replacing parts like the tracks, hoses, or hydraulic seals. Waiting too long to address these issues can lead to more significant and costly repairs.
  

Conclusion
The Case 850B Dozer is a powerful and reliable machine that can tackle tough jobs with ease. However, like all heavy equipment, it requires regular maintenance and attention to keep it in top shape. By staying proactive with inspections and maintenance, and addressing common issues such as hydraulic system failures, engine overheating, and track wear, operators can maximize the lifespan of their 850B and avoid costly repairs.
Whether you’re working on construction sites, land clearing, or road building, the Case 850B, when properly maintained, can continue to serve as a dependable workhorse for years to come.